as stated your gunna need to do a lot of fabricating, youll have to reinforce the unibody(especially around the motor mounts), and all the wiering and computer stuff will have to come from the donor, same with cooling stuff. also thats alot of rngine to put under the hood of an mj and you may never get it to cool good.
on the other side of the coin. it will be bad @$$ and i really wanna see someone do it